[astro-ph/0607160]
Ellipticity in Cosmic Microwave Background as a Tracer of Large-Scale Universe

Authors:

V.G.Gurzadyan, C.L.Bianco, A.L.Kashin, H.Kuloghlian, G.Yegorian

Abstract:

Wilkinson Microwave Anisotropy Probe (WMAP) 3-year data confirm the
ellipticity of anisotropies of Cosmic Microwave Background (CMB) maps, found
previously for Boomerang and WMAP 1-year high sensitivity maps. The low noise
level of the WMAP latter data enable also to show that, the ellipticity is a
property not described by the conventional cosmological model fitting the power
spectrum of CMB. As a large scale anomaly, the ellipticity characteristics are
consistent with the effect of geodesics mixing occurring in hyperbolic
Universe. Its relation to other large scale effects, i.e. to suppressed low
multipoles, as well as to dark energy if the latter is due to vacuum
fluctuations, is then an arising issue.

Elliptical spots does not necessarily imply non-Gaussianity !!
One can have very well have a Gaussian field that is not statistically isotropic (SI). The statistics is still completely represented by the two point correlation alone

The correlation function of temperature in two directions is not simply a function of the angular separation between n & n' : [tex] \langle\Delta T(n) \Delta T(n')\rangle \equiv C(n,n') \not\equiv C(n\cdot n')[/tex].
In particular, hot/contours spots will not have circularly symmetric contours -- elliptical contours is a simple special
case of that.